<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

<script>
    //判断当前浏览器内核
    function bw(){
        var ua = navigator.userAgent;
        if(/firefox/i.test(ua)){
            console.log("火狐");
        }else if (/chrome/i.test(ua)){
            console.log("谷歌");
        }else if (/msie/i.test(ua)){
            console.log("IE");
        }else if ("ActiveXObject" in window){
            console.log("IE11");
        }
        console.log(ua);
    }
    bw();
</script> -->


<script>
    //判断是PC还是移动 
    function goPAGE() {
        if ((navigator.userAgent.match(/(phone|pad|pod|iPhone|iPod|ios|iPad|Android|Mobile|BlackBerry|IEMobile|MQQBrowser|JUC|Fennec|wOSBrowser|BrowserNG|WebOS|Symbian|Windows Phone)/i))) {
            alert("mobile")
        }
        else {
            alert("pc")
        }
    }
        goPAGE();
</script>


<script>
    //判断是否是微信浏览器
    function is_weixn(){  
        var ua = navigator.userAgent.toLowerCase();  
        if(ua.match(/MicroMessenger/i)=="micromessenger") {  
            return true;  
        } else {  
            return false;  
        }  
    }  

    if( is_weixn() ) {
        document.write("微信浏览器")
    } else {
        document.write("其他浏览器")
    }
</script>


<script>
    //判断当前浏览器内核
    var browser = {
    versions: function() {
    var u = navigator.userAgent;
    return {
            trident: u.indexOf('Trident') > -1, //IE内核
            presto: u.indexOf('Presto') > -1, //opera内核
            webKit: u.indexOf('AppleWebKit') > -1, //苹果、谷歌内核
            gecko: u.indexOf('Firefox') > -1, //火狐内核Gecko
            mobile: !!u.match(/AppleWebKit.*Mobile.*/), //是否为移动终端
            ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), //ios
            android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1, //android
            iPhone: u.indexOf('iPhone') > -1 , //iPhone
            iPad: u.indexOf('iPad') > -1, //iPad
            webApp: u.indexOf('Safari') > -1 //Safari
        };
    }()
}
  
if (browser.versions.trident) {
    console.log('IE内核');
}else if(browser.versions.presto){
    console.log('opera内核');
}else if(browser.versions.webKit){
    console.log('苹果/谷歌内核');
}else if(browser.versions.gecko){
    console.log('火狐内核');
}
</script>
    
</body>
</html>